<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>行内元素</title>
    <style>
        a {
            background: powderblue;
            width: 500px;
            height: 500px;
        }

        span {

            background: powderblue;
            width: 500px;
            height: 500px;

        }
    </style>
</head>

<body>
    <a href="">百度</a>
    <span>test</span>
</body>

</html>